Bosch PS21 Motor Replacement

Step 1 Battery

• Pinch the two release tabs on the sides of the battery, and slide the battery out.
Step 2 Motor



• After removing the battery pack, locate the clip that connects the two halves of the outer casing shown in the picture. Remove the clip using angled tweezers or a similar tool. Save the clip for reassembly.
Step 3
• Locate the eight 5.5 mm screws as shown in the picture.
• Remove each screw using a small Phillips head screw driver. Save all the screws for reassembly.
Step 4
• Starting at the rear of the drill, use a wedge to separate the two halves of the outer case at the parting line.
Step 5
• The motor and trigger assembly are connected by two wires. Do not pull or put tension on these wires.
• Lift up the metal tab as shown in the first picture to free the trigger assembly.
• Gently dislodge the motor and trigger assembly from the drill case. Remove the components as one piece, shown in the second picture.
Step 6
• Be sure to not grip the pliers too firmly, as it could cause damage to the wire connectors.
• Firmly secure the motor assembly in place. Using a set of pliers, carefully pull the black wire connector away from the motor. Repeat this action with the red wire connector.
• The wire connections on the motor are color coded, matching the color wire that connects there.
Step 7
• Once the wires have been disconnected, separate the trigger mechanism from the motor assembly.
• Place your hands on each end of mechanism and carefully pull apart the assembly in order to separate the gearbox from the motor.

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Daniel Sebastian

Member since: 02/15/16

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IUPUI, Team 1-2, Harley Spring 2016 Member of IUPUI, Team 1-2, Harley Spring 2016

IUPUI-HARLEY-S16S1G2

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